CN-121976972-A - Volute component, blower and manufacturing method of blower

CN121976972ACN 121976972 ACN121976972 ACN 121976972ACN-121976972-A

Abstract

The invention discloses a volute component, a blower and a manufacturing method of the blower, and belongs to the technical field of non-positive displacement pumps; the spiral case main body is provided with an air outlet, the end cover main body comprises a connecting cover and a drainage shell, the connecting cover is connected with the front end of the spiral case main body and forms a diffusion flow channel together with the spiral case main body, the diffusion flow channel is communicated with the air outlet, the drainage shell is arranged in an extending mode along the front-back direction, the rear end of the drainage shell is connected with the connecting cover, the front end of the drainage shell is provided with an air inlet, a fluid director is connected in the drainage shell, the outer wall surface of the fluid director and the inner wall surface of the drainage shell form an accelerating flow channel together, the front end of the accelerating flow channel is communicated with the air inlet, and the rear end of the accelerating flow channel is communicated with the diffusion flow channel. The invention optimizes the fluid guiding structure of the blower and improves the energy of the whole machine.

Inventors

WANG YILING
YE JUNKAI
CHEN JIANYONG

Assignees

南方风机股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260407

Claims (10)

1. A volute assembly, comprising: the volute body is provided with an air outlet; The end cover main body comprises a connecting cover and a drainage shell, wherein the connecting cover is connected with the front end of the volute main body and forms a diffusion flow passage together with the volute main body, the diffusion flow passage is communicated with the air outlet, the drainage shell extends in the front-back direction, the rear end of the drainage shell is connected with the connecting cover, and the front end of the drainage shell is provided with an air inlet; The flow guide body is connected in the flow guide shell, an accelerating flow channel is formed by the outer wall surface of the flow guide body and the inner wall surface of the flow guide shell, the front end of the accelerating flow channel is communicated with the air inlet, and the rear end of the accelerating flow channel is communicated with the diffusion flow channel.
2. The volute assembly according to claim 1, wherein the front end of the flow guide body is of a hemispherical structure, the rear end of the flow guide body is of a tapered structure, the radius of the tapered structure is gradually reduced from front to back, the front end of the tapered structure is in smooth transition connection with the rear end of the hemispherical structure, the drainage shell comprises a bulge section and a concave section, the rear end of the bulge section is in smooth transition connection with the front end of the concave section, the hemispherical structure is arranged corresponding to the bulge section, the tapered structure is arranged corresponding to the front end of the concave section, the rear end of the concave section is connected with the connecting cover, and the cross section of the acceleration flow channel formed by the flow guide body and the drainage shell together is in an S shape.
3. The volute assembly of claim 1, wherein the diffuser passage has a D-shaped cross-sectional shape, and wherein the diffuser passage increases in cross-sectional area from a start to the outlet.
4. The volute assembly of claim 1, wherein the connection cover and the drain housing are of an integrally formed construction.
5. A blower comprising an impeller assembly and a volute assembly according to any one of claims 1 to 4, wherein the impeller assembly comprises an impeller body and a driving component, the impeller body is arranged between the volute body and the fluid director, the driving component is arranged at the rear side of the volute body, and an output shaft of the driving component penetrates through the outer wall surface of the volute body and is in driving connection with the impeller body.
6. The blower according to claim 5, wherein the impeller main body includes a chassis, main blades and sub blades, a forward protruding truncated cone is provided at a central portion of the chassis, the main blades and the sub blades are provided in plurality, respectively, the main blades and the sub blades are spaced apart from each other at an outer periphery of the truncated cone, each main blade is bent and extended from a front end of the truncated cone to an edge of the chassis, each sub blade is bent and extended from a central portion of the truncated cone to an edge of the chassis, respectively, and an impeller flow passage is formed between the adjacent main blades and sub blades.
7. The blower of claim 6, further comprising a plurality of rear vanes connected to the connecting cover and disposed about a central circumference of the connecting cover, wherein a rectifying flow passage is formed between adjacent two of the rear vanes, the rectifying flow passage being in communication with the impeller flow passage and the diffuser flow passage, respectively.
8. The blower of claim 7, wherein the rear guide vane includes a guide vane and a connection shaft, the guide vane being connected to one end of the connection shaft, the other end of the connection shaft being rotatably connected to the connection cover.
9. The blower of claim 6, wherein a mating gap is formed between the front edge of the impeller body and the inner wall surface of the flow directing housing, the mating gap having a width in a range of greater than or equal to 0.1mm and less than or equal to 0.3mm.
10. A method of manufacturing a blower according to any one of claims 5 to 9, comprising the steps of: calculating and determining shape parameters of the volute body, the end cover body, the current carrier and the impeller body according to the installation site space, the required air quantity and the air pressure; preparing the volute body, the end cover body, the fluid director, the impeller body and the driving component respectively; And assembling the volute body, the impeller body and the end cover body, and assembling the driving component after adjusting the fit clearance between the impeller body and the end cover body.

Description

Volute component, blower and manufacturing method of blower Technical Field The invention relates to the technical field of non-positive displacement pumps, in particular to a volute component, a blower and a manufacturing method of the blower. Background The high-speed centrifugal blower is widely applied to the fields of sewage treatment, pneumatic conveying, industrial ventilation and the like. In the related art, the blower drives the air flow to axially enter the impeller in a radial direction and enter the volute from the impeller outlet, and the traditional high-speed blower has room for improvement in structural design and hydrodynamic efficiency. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a volute assembly, a blower, and a method of manufacturing a blower. The invention solves the technical problems as follows: in a first aspect, a volute assembly is presented, comprising: the volute body is provided with an air outlet; The end cover main body comprises a connecting cover and a drainage shell, wherein the connecting cover is connected with the front end of the volute main body and forms a diffusion flow passage together with the volute main body, the diffusion flow passage is communicated with the air outlet, the drainage shell extends in the front-back direction, the rear end of the drainage shell is connected with the connecting cover, and the front end of the drainage shell is provided with an air inlet; The flow guide body is connected in the flow guide shell, an accelerating flow channel is formed by the outer wall surface of the flow guide body and the inner wall surface of the flow guide shell, the front end of the accelerating flow channel is communicated with the air inlet, and the rear end of the accelerating flow channel is communicated with the diffusion flow channel. The invention has the advantages that the gas enters the accelerating flow passage from the gas inlet, accelerates and turns along the accelerating flow passage, enters the diffusion flow passage, converges the gas flow through the diffusion flow passage, converts the kinetic energy into static pressure energy, and finally flows out through the gas outlet. In the process, due to the arrangement of the accelerating flow channel, the airflow can complete 90-degree turning and acceleration from the axial direction to the radial direction, and the inlet impact loss is reduced. As a further improvement of the technical scheme, the front end of the current carrier is of a hemispherical structure, the rear end of the current carrier is of a tapered structure, the radius of the tapered structure is gradually reduced from front to back, the front end of the tapered structure is in smooth transition connection with the rear end of the hemispherical structure, the drainage shell comprises a bulge section and a concave section, the rear end of the bulge section is in smooth transition connection with the front end of the concave section, the hemispherical structure is correspondingly arranged at the position of the bulge section, the tapered structure is correspondingly arranged with the front end of the concave section, the rear end of the concave section is connected with the connecting cover, and the cross section of an accelerating flow passage formed by the current carrier and the drainage shell together is in an S shape. As a further improvement of the technical scheme, the cross section of the diffusion flow passage is D-shaped, and the cross section area of the diffusion flow passage gradually increases from the starting end to the air outlet. As a further improvement of the technical scheme, the connecting cover and the drainage shell are of an integrated structure. In a second aspect, a blower is provided, including an impeller assembly and a volute assembly according to any one of the above technical solutions, where the impeller assembly includes an impeller main body and a driving component, the impeller main body is disposed between the volute main body and the fluid director, the driving component is mounted on a rear side of the volute main body, and an output shaft of the driving component is disposed through an outer wall surface of the volute main body and is in driving connection with the impeller main body. As a further improvement of the technical scheme, the impeller main body comprises a chassis, main blades and sub-blades, wherein the middle part of the chassis is provided with a cone frustum protruding forwards, the main blades and the sub-blades are respectively provided with a plurality of blades, the main blades and the sub-blades are arranged on the periphery of the cone frustum at intervals, each main blade is respectively bent and extended to the edge of the chassis from the front end of the cone frustum, each sub-blade is respectively bent and extended to the edge of the chassi